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-- |
-- Module : System.X509
-- License : BSD-style
-- Maintainer : Vincent Hanquez <vincent@snarc.org>
-- Stability : experimental
-- Portability : unix only
--
-- this module is portable to unix system where there is usually
-- a /etc/ssl/certs with system X509 certificates.
--
-- the path can be dynamically override using the environment variable
-- defined by envPathOverride in the module, which by
-- default is SYSTEM_CERTIFICATE_PATH
--
module System.X509.Unix
( getSystemCertificateStore
) where
import System.Environment (getEnv)
import Data.X509.CertificateStore
import Control.Applicative ((<$>))
import qualified Control.Exception as E
import Data.Maybe (catMaybes)
import Data.Monoid (mconcat)
defaultSystemPaths :: [FilePath]
defaultSystemPaths =
[ "/etc/ssl/certs/" -- linux
, "/system/etc/security/cacerts/" -- android
, "/usr/local/share/certs/" -- freebsd
, "/etc/ssl/cert.pem" -- openbsd
]
envPathOverride :: String
envPathOverride = "SYSTEM_CERTIFICATE_PATH"
getSystemCertificateStore :: IO CertificateStore
getSystemCertificateStore = mconcat . catMaybes <$> (getSystemPaths >>= mapM readCertificateStore)
getSystemPaths :: IO [FilePath]
getSystemPaths = E.catch ((:[]) <$> getEnv envPathOverride) inDefault
where
inDefault :: E.IOException -> IO [FilePath]
inDefault _ = return defaultSystemPaths
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